Revert "Allow MessageFilters to restrict listening to specific message classes"

chrome/browser/prerender/prerender_message_filter.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_message_filter.h"
 
 #include "base/bind.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prerender/prerender_link_manager.h"
 #include "chrome/browser/prerender/prerender_link_manager_factory.h"
@@ skipping 15 matching lines @@
     return;
   prerender_link_manager->OnChannelClosing(render_process_id);
 }
 
 }  // namespace
 
 namespace prerender {
 
 PrerenderMessageFilter::PrerenderMessageFilter(int render_process_id,
                                                Profile* profile)
-    : BrowserMessageFilter(PrerenderMsgStart),
-      render_process_id_(render_process_id),
+    : render_process_id_(render_process_id),
       profile_(profile) {
 }
 
 PrerenderMessageFilter::~PrerenderMessageFilter() {
 }
 
 bool PrerenderMessageFilter::OnMessageReceived(const IPC::Message& message,
                                                bool* message_was_ok) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(PrerenderMessageFilter, message, *message_was_ok)
@@ skipping 55 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   PrerenderLinkManager* prerender_link_manager =
       PrerenderLinkManagerFactory::GetForProfile(profile_);
   if (!prerender_link_manager)
     return;
   prerender_link_manager->OnAbandonPrerender(render_process_id_, prerender_id);
 }
 
 }  // namespace prerender